Finding the Fourth Proportional to 824,139.48, 1,137,488.22 and 484,801.32

Step by Step Solution

1. Step 1: Write the proportion equation
   824,139.48 : 1,137,488.22 = 484,801.32 : x
2. Step 2: Convert to fraction form
   824,139.48/1,137,488.22 = 484,801.32/x
3. Step 3: Cross multiply
   824,139.48x = 1,137,488.22 × 484,801.32
4. Step 4: Simplify right side
   824,139.48x = 551,455,790,540.45
5. Step 5: Solve for x
   x = 551,455,790,540.45/824,139.48
6. Step 6: Final answer
   x = 669,129.20